Question

Three angles of a quadrilateral are equal and fourth angle is 120°. Each of three equal angles is ______.

Options

• 80°

• 90°

• 100°

• 110°

Answer 1

Three angles of a quadrilateral are equal and fourth angle is 120°. Each of three equal angles is 80°.

Explanation:

Sum of angles of a quadrilateral = 360°.

Subtract the fourth angle 120° to get 240°.

Divide by 3 : 240° ÷ 3 = 80° for each of the three equal angles.